AMD EPYC up to Embedded 9005 SEV-SNP input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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2.3$0-$5k0.00+

Summaryinfo

A vulnerability classified as problematic was found in AMD EPYC up to Embedded 9005. Impacted is an unknown function of the component SEV-SNP. Such manipulation leads to input validation. This vulnerability is documented as CVE-2026-40670. The attack needs to be performed locally. There is not any exploit available.

Detailsinfo

A vulnerability was found in AMD EPYC up to Embedded 9005. It has been rated as problematic. Affected by this issue is an unknown function of the component SEV-SNP. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is integrity. CVE summarizes:

Improper check for unusual or exceptional conditions in AMD Secure Encrypted Virtualization - Secure Nested Paging (SEV-SNP) could allow a privileged attacker to potentially overlap MMIO regions with DRAM regions resulting in loss of integrity.

The advisory is shared for download at amd.com. This vulnerability is handled as CVE-2026-40670 since 04/14/2026. The exploitation is known to be easy. The attack needs to be approached locally. The exploitation needs additional levels of successful authentication. There are neither technical details nor an exploit publicly available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 2.3
VulDB Meta Temp Score: 2.3

VulDB Base Score: 2.3
VulDB Temp Score: 2.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

04/14/2026 CVE reserved
11/10/2026 +210 days Advisory disclosed
11/10/2026 +0 days VulDB entry created
11/10/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: amd.com
Status: Confirmed

CNA: AMD
CVE: CVE-2026-40670 (🔒)

GCVE (CVE): GCVE-0-2026-40670
GCVE (VulDB): GCVE-100-435176

Entryinfo

Created: 11/10/2026 23:37
Changes: 11/10/2026 23:37 (64)
Complete: 🔍
Cache ID: 216::103

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